| II | AAK | Ala Archa, Kyrgyzstan | |  |  | 42.64 | 74.49 | 1645 | -- |
| II | ABKT | Alibek, Turkmenistan | | | | 37.93 | 58.12 | 678 | -- |
| II | ABPO | Ambohimpanompo, Madagascar | | | | -19.02 | 47.23 | 1528 | -- |
| IU | ADK | Adak, Aleutian Islands, Alaska | | |  | 51.88 | -176.68 | 116 | Q680 |
| IU | AFI | Afiamalu, Samoa | | |  | -13.91 | -171.78 | 706 | Q680 |
| II | ALE | Alert, N.W.T., Canada | | | | 82.5 | -62.35 | 60 | -- |
| IU | ANMO | Albuquerque, New Mexico, USA | | | | 34.946 | -106.457 | 1820 | Q330 |
| IU | ANTO | Ankara, Turkey | | | | 39.87 | 32.79 | 883 | Q680 |
| CU | ANWB | Willy Bob, Antigua and Barbuda | | | | 17.67 | -61.79 | 39 | Q330HR #1624 |
| II | ARU | Arti, Russia | | | | 56.43 | 58.56 | 250 | -- |
| II | ASCN | Butt Crater, Ascension Island | | | | -7.93 | -14.36 | 173 | -- |
| CU | BBGH | Gun Hill, Barbados | | | | 13.14 | -59.56 | 180 | Q330HR #1635 |
| IU | BBSR | Bermuda Biological Station for Research, St George's Bermuda | | | | 32.371 | -64.696 | 30 | Q330 |
| CU | BCIP | Isla Barro Colorado, Panama | | | | 9.17 | -79.84 | 61 | Q330HR #1625 |
| II | BFO | Black Forest Observatory, Schiltach, Germany | | | | 48.33 | 8.33 | 589 | -- |
| GT | BGCA | Bogoin, Central African Republic | | | | 5.18 | 18.42 | 676 | -- |
| IU | BILL | Bilibino, Russia | | |  | 68.07 | 166.45 | 299 | Q680 |
| IC | BJT | Baijiatuan, Beijing, China | | | | 40.02 | 116.17 | 197 | Q680 |
| II | BORG | Borgarfjordur, Asbjarnarstadir, Iceland | | | | 64.75 | -21.33 | 110 | -- |
| GT | BOSA | Boshof, South Africa | | | | -28.61 | 25.26 | 1280 | -- |
| II | BRVK | Borovoye, Kazakhstan | | | | 53.06 | 70.28 | 330 | -- |
| IU | CASY | Casey, Antarctica | | | | -66.28 | 110.54 | 159 | Q680 |
| IU | CCM | Cathedral Cave, Missouri, USA | | | | 38.06 | -91.24 | 222 | Q680 |
| IU | CHTO | Chiang Mai, Thailand | | | | 18.79 | 98.98 | 316 | Q680 |
| BK | CMB | Columbia College, Columbia, CA, USA | | | | 38.03 | -120.39 | 697 | -- |
| II | CMLA | Cha de Macela, Sao Miguel Island, Azores | | | | 37.76 | -25.52 | 429 | -- |
| II | COCO | West Island, Cocos (Keeling) Islands | | | | -12.19 | 96.83 | 1 | -- |
| IU | COLA | College Outpost, Alaska, USA | | | | 64.87 | -147.85 | 194 | Q680 |
| IU | COR | Corvallis, Oregon, USA | | | | 44.59 | -123.3 | 121 | Q680 |
| GT | CPUP | Villa Florida, Paraguay | | | | -26.33 | -57.33 | 105 | -- |
| IU | CTAO | Charters Towers, Australia | | | | -20.09 | 146.25 | 357 | Q680 |
| IU | DAV | Davao, Philippines | | | | 7.07 | 125.58 | 145 | Q680 |
| GT | DBIC | Dimbokro, Cote d'Ivoire | | | | 6.67 | -4.86 | 125 | -- |
| II | DGAR | Diego Garcia, Chagos Islands, Indian Ocean | | | | -7.41 | 72.45 | 1 | -- |
| IU | DWPF | Disney Wilderness Preserve, Florida, USA | | | | 28.11 | -81.43 | 20 | Q680 |
| II | EFI | Mount Kent, East Falkland Island | | | | -51.68 | -58.06 | 110 | -- |
| IC | ENH | Enshi, Hubei Province, China | | | | 30.27 | 109.49 | 487 | Q680 |
| II | ERM | Erimo, Hokkaido Island, Japan | | | | 42.02 | 143.16 | 40 | -- |
| II | ESK | Eskdalemuir, Scotland, UK | | | | 55.32 | -3.21 | 242 | -- |
| II | FFC | Flin Flon, Canada | | | | 54.73 | -101.98 | 338 | -- |
| IU | FUNA | Funafuti, Tuvalu | | | | -8.53 | 179.2 | 20 | Q680 |
| IU | FURI | Mt. Furi, Ethiopia | | | | 8.9 | 38.69 | 2545 | Q680 |
| IU | GNI | Garni, Armenia | | | | 40.15 | 44.74 | 1609 | Q680 |
| IU | GRFO | Grafenberg, Germany | | | | 49.69 | 11.22 | 384 | Q680 |
| CU | GRGR | Grenville, Grenada | | | | 12.13 | -61.65 | 195 | Q330HR #1622 |
| CU | GRTK | Grand Turk, Turks and Caicos Islands | | | | 21.51 | -71.13 | 12 | Q330HR #1630 |
| CU | GTBY | Guantanamo Bay, Cuba | | | | 19.93 | -75.11 | 79.2 | Q330HR #1627 |
| IU | GUMO | Guam, Mariana Islands | | | | 13.59 | 144.87 | 164 | Q680 |
| IC | HIA | Hailar, Neimenggu Province, China | | | | 49.27 | 119.74 | 610 | Q680 |
| IU | HKT | Hockley, Texas | | | | 29.96 | -95.84 | -413 | Q680 |
| IU | HNR | Honiara, Solomon Islands | | | | -9.43 | 159.95 | 72 | Q680 |
| II | HOPE | Hope Point, South Georgia Island | | | | -54.28 | -36.49 | 20 | -- |
| IU | HRV | Harvard, Massachusetts, USA | | | | 42.51 | -71.56 | 200 | Q330 |
| IU | INCN | Inchon, Republic of Korea | | | | 37.48 | 126.63 | 420 | Q680 |
| IU | JOHN | Johnston Island, USA | | | | 16.73 | -169.53 | 2 | Q680 |
| II | JTS | Las Juntas de Abangares, Costa Rica | | | | 10.29 | -84.95 | 340 | -- |
| II | KAPI | Kappang, Sulawesi, Indonesia | | | | -5.01 | 119.75 | 300 | -- |
| IU | KBL | Kabul, Afghanistan | | | | 34.54 | 69.04 | 1920 | Q680 |
| IU | KBS | Ny-Alesund, Spitzbergen, Norway | | | | 78.93 | 11.94 | 77 | Q680 |
| II | KDAK | Kodiak Island, Alaska, USA | | | | 57.78 | -152.58 | 152 | -- |
| IU | KEV | Kevo, Finland | | | | 69.757 | 27.003 | 100 | Q330 |
| IU | KIEV | Kiev, Ukraine | | | | 50.69 | 29.21 | 163 | Q680 |
| IU | KIP | Kipapa, Hawaii, USA | | | | 21.42 | -158.01 | 70 | Q680 |
| II | KIV | Kislovodsk, Russia | | | | 43.96 | 42.69 | 1054 | -- |
| IU | KMBO | Kilima Mbogo, Kenya | | | | -1.13 | 37.25 | 1960 | Q680 |
| IC | KMI | Kunming, Yunnan Province, China | | | | 25.12 | 102.74 | 1975 | Q680 |
| IU | KNTN | Kanton, Kiritibati | | | | -2.774 | -171.719 | 20 | Q330 |
| IU | KONO | Kongsberg, Norway | | | | 59.65 | 9.6 | 216 | Q680 |
| IU | KOWA | Kowa, Mali | | | | 14.5 | -4.01 | 321 | Q680 |
| II | KURK | Kurchatov, Kazakhstan | | | | 50.72 | 78.62 | 184 | -- |
| II | KWAJ | Kwajalein Atoll, Pacific Ocean | | | | 8.8 | 167.61 | 0 | -- |
| GT | LBTB | Lobatse, Botswana, Africa | | | | -25.02 | 25.6 | 1128 | -- |
| IU | LCO | Las Campanas Astronomical Observatory, Chile | | | | -29.01 | -70.7 | 2299 | Q680 |
| GT | LPAZ | La Paz , Bolivia | | | | -16.17 | -68.08 | 4817 | -- |
| IC | LSA | Tibet, China | | | | 29.7 | 91.15 | 3789 | Q680 |
| IU | LSZ | Lusaka, Zambia | | | | -15.28 | 28.19 | 1200 | Q330 |
| IU | LVC | Limon Verde, Chile | | | | -22.613 | -68.911 | 2960 | Q330 |
| II | LVZ | Lovozero, Russia | | | | 67.9 | 34.65 | 630 | -- |
| IU | MA2 | Magadan, Russia | | | | 59.58 | 150.77 | 339 | Q680 |
| IU | MACI | Morro de la Arena, Canary Islands | | | | 28.25 | -16.51 | 1674 | Q680 |
| IU | MAJO | Matsushiro, Japan | | | | 36.54 | 138.21 | 405 | Q680 |
| IU | MAKZ | Makanchi, Kazakhstan | | | | 46.81 | 81.98 | 600 | Q680 |
| II | MBAR | Mbarara, Uganda | | | | -0.6 | 30.74 | 1390 | -- |
| IU | MBWA | Marble Bar, Western Australia | | | | -21.16 | 119.73 | 190 | Q680 |
| IC | MDJ | Mudanjiang, Heilongjiang Province, China | | | | 44.62 | 129.59 | 250 | Q680 |
| IU | MIDW | Midway Island, USA | | | | 28.22 | -177.37 | 18 | Q680 |
| II | MSEY | Mahe, Seychelles | | | | -4.67 | 55.48 | 475 | -- |
| IU | MSKU | Masuku, Gabon | | | | -1.66 | 13.61 | 312 | Q680 |
| II | MSVF | Monasavu, Fiji | | | | -17.73 | 178.05 | 783 | -- |
| CU | MTDJ | Mount Denham, Jamaica | | | | 18.23 | -77.53 | 925 | Q330HR #1626 |
| II | NIL | Nilore, Pakistan | | | | 33.65 | 73.27 | 629 | -- |
| II | NNA | Nana, Peru | | | | -11.99 | -76.84 | 575 | -- |
| II | NRIL | Norilsk, Russia | | | | 69.5 | 88.44 | 92 | -- |
| IU | NWAO | Narrogin, Australia | | | | -32.93 | 117.23 | 265 | Q680 |
| II | OBN | Obninsk, Russia | | | | 55.11 | 36.57 | 160 | -- |
| IU | OTAV | Otavalu, Ecuador | | | | 0.24 | -78.45 | 3510 | Q680 |
| IU | PAB | San Pablo, Spain | | | | 39.54 | -4.35 | 950 | Q680 |
| II | PALK | Pallekele, Sri Lanka | | | | 7.27 | 80.7 | 460 | -- |
| IU | PAYG | Puerto Ayora, Galapagos Islands | | | | -0.67 | -90.29 | 270 | Q680 |
| IU | PET | Petropavlovsk, Russia | | | | 53.02 | 158.65 | 150 | Q680 |
| II | PFO | Pinon Flat, California, USA | | | | 33.61 | -116.46 | 1280 | -- |
| GT | PLCA | Paso Flores, Argentina | | | | -40.73 | -70.55 | 1050 | -- |
| IU | PMG | Port Moresby, New Guinea | | | | -9.41 | 147.15 | 67 | Q680 |
| IU | PMSA | Palmer Station, Antarctica | | | | -64.77 | -64.05 | 10 | Q680 |
| IU | POHA | Pohakuloa, Hawaii, USA | | | | 19.76 | -155.53 | 1967 | Q680 |
| IU | PTCN | Pitcairn Island, South Pacific | | | | -25.07 | -130.1 | 227 | Q680 |
| IU | PTGA | Pitinga, Brazil | | | | -0.73 | -59.97 | 237 | Q680 |
| IC | QIZ | Qiongzhong, Hainan Province, China | | | | 19.03 | 109.84 | 230 | Q680 |
| IU | QSPA | South Pole Remote Earth Science Observatory (Quiet Zone) | | | | -89.93 | 144.44 | 2850 | Q680 |
| IU | RAIO | Rainier, Oregon, USA | | | | 46.04 | -122.89 | 11 | Q680 |
| IU | RAO | Raoul, Kermadec Islands | | | | -29.25 | -177.92 | 110 | Q680 |
| IU | RAR | Rarotonga, Cook Islands | | | | -21.21 | -159.77 | 28 | Q680 |
| II | RAYN | Ar Rayn, Saudi Arabia | | | | 23.52 | 45.5 | 631 | -- |
| IU | RCBR | Riachuelo, Brazil | | | | -5.83 | -35.9 | 409 | Q680 |
| II | RPN | Rapanui, Easter Island, Chile | | | | -27.13 | -109.33 | 110 | -- |
| IU | RSSD | Black Hills, South Dakota, USA | | | | 44.12 | -104.04 | 2060 | Q680 |
| II | SACV | Santiago Island, Cape Verde | | | | 14.97 | -23.61 | 387 | -- |
| IU | SAML | Samuel, Brazil | | | | -8.949 | -63.183 | 120 | Q680 |
| IU | SBA | Scott Base, Antarctica | | | | -77.85 | 166.76 | 20 | Q680 |
| CU | SDDR | Presa de Sabaneta, Dominican Republic | | | | 18.98 | -71.29 | 589 | Q330HR #1631 |
| IU | SDV | Santo Domingo, Venezuela | | | | 8.88 | -70.63 | 1618 | Q680 |
| IU | SFJD | Sondre Stromfjord, Greenland | | | | 67 | -50.62 | 330 | Q330 |
| II | SHEL | Horse Pasture, St. Helena Island | | | | -15.96 | -5.75 | 537 | -- |
| IU | SJG | San Juan, Puerto Rico | | | | 18.11 | -66.15 | 457 | Q680 |
| IU | SLBS | Sierra la Laguna Baja California Sur, Mexico | | | | 23.686 | -109.944 | 825 | Q330 |
| IU | SNZO | South Karori, New Zealand | | | | -41.31 | 174.7 | 62 | Q680 |
| IC | SSE | Shanghai, China | | | | 31.1 | 121.19 | 15 | Q680 |
| IU | SSPA | Standing Stone, Pennsylvania | | | | 40.64 | -77.89 | 352 | Q680 |
| II | SUR | Sutherland, South Africa | | | | -32.38 | 20.81 | 1770 | -- |
| IU | TARA | Tarawa Island, Republic of Kiribati | | | | 1.35 | 172.92 | 20 | Q680 |
| IU | TATO | Taipei, Taiwan | | | | 24.97 | 121.5 | 160 | Q680 |
| II | TAU | Hobart, Tasmania, Australia | | | | -42.91 | 147.32 | 132 | -- |
| IU | TEIG | Tepich, Yucatan, Mexico | | | | 20.23 | -88.28 | 40 | Q680 |
| CU | TGUH | Tegucigalpa, Honduras | | | | 14.06 | -87.27 | 0 | Q330HR #1632 |
| IU | TIXI | Tiksi, Russia | | | | 71.65 | 128.87 | 50 | Q680 |
| II | TLY | Talaya, Russia | | | | 51.68 | 103.64 | 579 | -- |
| IU | TRIS | Tristan da Cunha | | | | -37.07 | -12.32 | 57 | Q680 |
| IU | TRQA | Tornquist, Argentina | | | | -38.06 | -61.98 | 540 | Q680 |
| IU | TSUM | Tsumeb, Namibia | | | | -19.2 | 17.58 | 1260 | Q330 |
| IU | TUC | Tucson, Arizona | | | | 32.31 | -110.78 | 874 | Q680 |
| IU | ULN | Ulaanbaatar, Mongolia | | | | 47.87 | 107.05 | 1615 | Q680 |
| GT | VNDA | Wright Valley (Bull Pass) Antarctica | | | | -77.52 | 161.85 | 151 | -- |
| IU | WAKE | Wake Island | | | | 19.283 | 166.652 | 20 | Q330 |
| IU | WCI | Wyandotte Cave, Indiana, USA | | | | 38.23 | -86.29 | 638 | Q680 |
| IC | WMQ | Urumqi, Xinjiang Province, China | | | | 43.82 | 87.69 | 903 | Q680 |
| II | WRAB | Tennant Creek, NT, Australia | | | | -19.93 | 134.36 | 366 | -- |
| IU | WVT | Waverly, Tennessee, USA | | | | 36.13 | -87.83 | 157 | Q680 |
| IC | XAN | Xi'an, China | | | | 34.03 | 108.92 | 630 | Q680 |
| IU | XMAS | Kiritimati Island, Republic of Kiribati | | | | 2.04 | -157.45 | 2 | Q680 |
| IU | YAK | Yakutsk, Russia | | | | 62.03 | 129.68 | 105 | Q680 |
| IU | YSS | Yuzhno Sakhalinsk, Russia | | | | 46.96 | 142.76 | 100 | Q680 |
